1-carbamoylalkyl-2-phenylindoles, pharmaceutical compositions and use

ABSTRACT

Aminoalkylindoles of the formula ##STR1## and 1-carbamoylalkyl-2-phenlindoles of the formula ##STR2## exhibit substantial estrogenic activity and a relatively low degree of anti-estrogenic activity.

CROSS-REFERENCE TO RELATED APPLICATIONS

Indole derivatives are disclosed in applicants' earlier U.S. patent application Ser. No. 07/330,047, filed Mar. 29, 1989, based on a series of parent applications and claiming priority of German Application No. P 38 15 993.1, filed Apr. 13, 1981.

BACKGROUND OF THE INVENTION

The present invention relates to aminoalkylindoles, processes for their production, and pharmaceutical preparations containing same.

SUMMARY OF THE INVENTION

Objects of this invention are to provide novel chemical compounds, processes of making compounds, pharmaceutical preparations, and methods of administering such preparations.

Upon further study of the specification and appended claims, further objects and advantages of this invention will become apparent to those skilled in the art.

To attain such objects, there are provided aminoalkylindoles of Formula I ##STR3## wherein

R₁ is hydrogen, hydroxyl, or an alkanoyloxy group containing 1-10 carbon atoms,

R₂ is a hydroxyl or an alkanoyloxy group containing 1-10 carbon atoms,

R₃ is hydrogen or methyl,

R₄, R₅, being the same or different, represent hydrogen, alkyl of 1-10 carbon atoms, aralkyl of 7-10 carbon atoms, or cycloalkyl of 3-7 carbon atoms, or

R₄, R₅, with the inclusion of a single nitrogen atom or with the inclusion of a nitrogen and an oxygen atom or with the inclusion of two nitrogen atoms as heteroatoms, form a 5- or 6-membered heterocyclic ring, and

n is an integer in the range of 4-15, inclusive,

and the salts thereof are preferably physiologically acceptable salts of these compounds with acids.

Suitable as R₁ and R₂ alkanoyloxy groups are radicals of organic carboxylic acids containing 1-10 carbon atoms, which radicals can be saturated or unsaturated. They are derived from aliphatic, cycloaliphatic, aliphatic cycloaliphatic, cycloaliphatic aliphatic, and aromatic monocarboxylic acids. When a cyclic acid, the number of carbon atoms in the ring varies from 3 to 7, inclusive. The alkanoyloxy groups of acetic, propionic, butyric, isobutyric, pivalic, caproic, acrylic, crotonic, heptanoic, caprylic, pelargonic, decanoic, 3-cyclopentylpropionic, and benzoic acid are preferred as radicals R₁ and R₂.

The radical R₁ can be in the positions 4, 5, 6, or 7 of the indole ring system, with the 5-position being especially suitable.

The radical R₂ can be in the positions 2, 3, or 4 on the phenyl ring, when the position is the point of linkage to the 2-position of the indole system. Such compounds are especially pharmaceutically active when the radical R₂ is in the 4-position (para position).

Alkyl groups containing 1-10 carbon atoms and cycloalkyl groups of 3-7 carbon atoms are suitable as the R₄ and R₅ radicals.

Methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, and decanyl and isomers thereof are suitable as alkyl groups, and cyclopentyl and cyclohexyl are especially suitable as cycloalkyl groups.

Benzyl is a particular example of an aralkyl group represented by the R₄ and/or R₅ radicals.

The radicals R₄ and R₅ can be the same or different or can be components of a common ring. With the presence of a ring, the latter can contain, in addition to the nitrogen atom, an oxygen atom and a second nitrogen atom.

Particularly suitable as R₄ and R₅ radicals are the combination of hydrogen/methyl (derived from methylamino), hydrogen/hydrogen (derived from amino), and methyl/methyl (derived from dimethylamino), as well as the (CH₂)₄ radical (derived from pyrrolidino), the (CH₂)₅ radical (derived from piperidino), the (CH₂)₂ --O--(CH₂)₂ radical (derived from morpholino), and the (CH₂)₂ --NH--(CH₂)₂ radical (derived from piperazino).

The invention also relates to salts of compounds of Formula I. These salts can be both salts or inorganic and of organic acids. Especially suitable are the physiologically compatible salts, such as, for example, hydrochlorides, hydrobromides, acetates, malonates, and citrates.

The invention further relates to processes for the production of aminoalkylindoles of general Formula I. In this case, a compound of Formula IIa ##STR4## or of Formula IIb ##STR5## wherein

R₃, R₄, R₅, and n have the same meaning specified in Formula I,

R₆ is hydrogen or alkoxy containing 1-4 carbon atoms, and

R₇ is alkoxy containing 1-4 carbon atoms is reacted under the conditions of an ether cleavage to a compound of Formula Ia ##STR6##

Alternatively, a compound of Formula IIIb ##STR7## wherein R₈ is hydrogen or hydroxyl, the carbonyl function of the compound of Formula IIIb is completely reduced, and then the free aromatic hydroxyl group(s) is/are converted into an alkanoyloxy group having 1-10 carbon atoms.

A compound of Formula I is optionally converted with an organic or inorganic acid into the corresponding salt.

As alkoxy groups of the radicals R₆ and R₇, suitable are those having 1-4 carbon atoms, such as, for example, the methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, and tertbutoxy groups.

Those compounds of compound II, in which R₆ and R₇ represent alkoxy groups having 1-4 carbon atoms can be converted into the corresponding hydroxy groups of Formula I by ether cleavage. The ether cleavage takes place with or without a solvent. Boron tribromide, boron trifluoride, aluminum trichloride, silicon tetrachloride, aluminum tribromide, sodium methylthiolate, and trimthylsilyl iodide are suitable reagents for the ether cleavage. The reaction is generally performed at temperatures between -70° and 200° C. Inert solvents are suitable as solvents for this ether cleavage, for example, aliphatic halogenated hydrocarbons, e.g., methylene chloride; aromatic hydrocarbons, e.g., benzene, toluene, and xylene; halogenated aromatic hydrocarbons, e.g., chlorobenzene, dichlorobenzene; and dimethylformamide, as well as acetonitrile. Aliphatic ethers with alkyl radicals from 1-6 carbon atoms are also suitable.

Alternatively, the ether cleavage can also take place with the use of concentrated hydroiodic acid, pyridine hydrochloride, hydrobromic acid, and methyl magnesium iodide at temperatures between 20° and 250° C.

The processes usually used in chemistry for esterification are suitable for the optional subsequent esterification of the phenolic hydroxyl groups. For example, esterification can be conducted with a carboxylic acid or a carboxylic acid anhydride in the presence of strong acids, such as, for example, trifluoroacetic acid, perchloric acid, or p-toluenesulfonic acid, at room temperature, or at a somewhat elevated temperature. Similarly, the esterification can be conducted with a carboxylic acid anhydride in the presence of a tertiary amine at about 20°-80° C.

If pyridine and 4-dimethylaminopyridine are used together as tertiary amines, the esterification preferably can be performed at room temperature.

Any subsequent salt formation reaction is conducted under conventional conditions.

It has been found that compounds of Formula I and compounds of Formula IIIb have strongly anti-estrogenic properties.

Compounds with anti-estrogenic properties, i.e., materials which exhibit inhibitory activity against estrogens, have already been described in the literature.

Tamoxifen, for example, can be mentioned as an anti-estrogen (Eur.J. Cancer Clin. Oncol 1985, 21, 985, and J. S. Patterson, "10 Years of Tamoxifen in Breast Cancer," in Hormonal Manipulation of Cancer: Peptides, Growth Factors and New (Anti) Steroidal Agents (Raven Press: New York, 1987).

Steroidal anti-estrogens are described in European Patent Application No. 0138 504. Other anti-estrogens, which, like the present invention, relate to indole derivatives, have already been described in German Patent Specification No. 32 32 968, in J.Med.Chem. 1983, 26, 113; J.Med.Chem., 1984, 27, 1439; Eur.J. Cancer Clin. Oncol. 1985, 21, 531; and Cancer Treatment Reviews 1984, 11, 147. Hydroxylated 2-phenylindoles, which are present in the form of diamine platinum (II) complex compounds, are named in German Laid-Open Specification No. 37 30 746.

A disadvantage of the previously known anti-estrogens is that they also have a more or less strongly pronounced estrogenic activity, which is considered to be undesirable.

In contradistinction, the compounds of Formula I and Formula IIIb of the present invention exhibit strong anti-estrogenic activity, with only minimal residual estrogen activity.

The compounds of Formula I have a marked affinity for the estradiol receptor and competitively displace ³ H-17β estradiol from the receptor.

In vivo, they exhibit strong anti-estrogenic effects on the mouse uterus and inhibit the estrogen-stimulated uterus growth up to 100 percent. Conversely, estrogen activity cannot be detected or can be detected only to a small extent in these tests. Of particular important is that these compounds have an inhibiting effect on the growth of hormone-dependent tumor cells, especially on the growth of estrogen-dependent human breast tumor cells (MCF-7).

Thus, the compounds according to the invention are suitable for therapy of estrogen-dependent diseases, for example, anovular infertility, prostatic hyperplasia, breast cancer, endometrium cancer, and melanoma.

The following pharmacological tests show the action of the compounds according to the invention.

Table 1 shows an overall view of the tested compounds of Formula I and their relative binding affinity (RBA*) for the estrogen receptor from calf uterus, relative to 17β estradiol=100.

The test protocol is described in Cancer Treatment Reviews 1984, 11, 147.

From Table 1 it can be seen that compounds 2, 3, 6, and 8 exhibit the greatest affinity in comparison with estradiol. In this tested series, compound 7 exhibited the least affinity for the estrogen receptor.

                  TABLE 1                                                          ______________________________________                                         Tested compounds of formula I and their relative binding                       affinities for the estrogen receptor                                            ##STR8##                                                                      Compound                                                                               n       R.sub.3 R.sub.4  R.sub.5                                                                               RBA*                                   ______________________________________                                         1       4       CH.sub.3                                                                               (CH.sub.2).sub.4                                                                             3.6                                      2       6       CH.sub.3                                                                               H        H      25                                     3       6       CH.sub.3                                                                               CH.sub.3 H      27                                     4       6       CH.sub.3                                                                               CH.sub.3 CH.sub.3                                                                              12                                     5       6       H       (CH.sub.2).sub.4                                                                             2.3                                      6       6       CH.sub.3                                                                               (CH.sub.2).sub.4                                                                             21                                       7       6       H       (CH.sub.2).sub.5                                                                             1.3                                      8       6       CH.sub.3                                                                               (CH.sub.2).sub.5                                                                             23                                       9       8       CH.sub.3                                                                               (CH.sub.2).sub.4                                                                             7.6                                      10      6       CH.sub.3                                                                               (CH.sub.2).sub.2 O CH.sub.2).sub.2                                                           10                                       11      6       CH.sub.3                                                                               C.sub.2 H.sub.5                                                                         C.sub.2 H.sub.5                                                                       14                                     12      6       CH.sub.3                                                                               CH.sub.2 C.sub.6 H.sub.5                                                                H      15                                     ______________________________________                                          *Relative binding affinities for the estrogen receptor from calf uterus,       relative to 17beta estradiol = 100                                       

Table 2 shows the estrogen and anti-estrogen activities of compounds 1, 2, 3, and 6, as well as 10, 11, and 12. These activities were found in an in vivo test on the infantile mouse. This test is fully described in Cancer Treatment Reviews 1984, 11, 147, and J.Med.Chem., 1984, 27, 1439. From Table 2, it can be seen that all tabulated compounds exhibit a strong to very strong estrogen antagonistic effect. An estrogen intrinsic activity is hardly detectable in all the tested derivatives, with the exception of compound 3, 11, and 12 at the highest tabulated dosages.

                  TABLE 2                                                          ______________________________________                                         Uterotrophic and antiuterotrophic                                              action on infantile mouse                                                                     Uterotro-   Antiutero-                                                 Dose    phic Test   trophic   Test                                      Cmpd   (ug)    Rel. uterus wgt                                                                            Rel. uterus wgt                                                                          Inhib. (%)                                ______________________________________                                         Control        7.7 ± 2.5                                                    1      1       7.6 ± 2.8                                                                               43.7 ± 8.2                                                                            5                                                5       8.0 ± 3.1                                                                               47.6 ± 10.5                                             25      6.4 ± 1.1                                                                               16.2 ± 4.6                                                                            78                                               125     6.4 ± 1.3                                                                               25.5 ± 7.9                                                                            53                                        Estrone                                                                               0.4     45.8 ± 6.2                                                   Control        15.9 ± 3.6                                                   2      1       10.9 ± 4.7                                                          5       12.0 ± 2.2                                                                              30.0 ± 9.1                                                                            68                                               25      12.4 ± 2.7                                                                              15.1 ± 1.2                                                                            102                                              125     16.9 ± 2.7                                                                              16.2 ± 2.7                                                                            99                                        3      1       14.2 ± 3.1                                                          5       22.8 ± 8.6                                                                              38.1 ± 8.2                                                                            49                                               25                  41.0 ± 8.5                                                                            43                                               125     34.0 ± 6.3                                                                              33.8 ± 2.4                                                                            59                                        Estrone                                                                               0.4     59.8 ± 20.0                                                  Control        15.5 ± 2.9                                                   6      1       12.5 ± 1.7                                                                              45.8 ± 3.2                                                                            20                                               5       9.0 ± 1.8                                                                               15.4 ± 1.7                                                                            100                                              25      13.9 ± 2.8                                                                              14.4 ± 2.2                                                                            103                                              125                  8.9 ± 1.6                                                                            117                                       Estrone                                                                               0.4     53.4 ± 3.6                                                   Control        11.5 ± 3.6                                                   6      1                   48.3 ± 7.2                                              5                   20.1 ± 7.3                                                                            73                                               25                  12.6 ± 1.9                                                                            97                                               50      8.2 ± 1.8                                                           250     12.7 ± 2.7                                                   Estrone                                                                               0.4     43.0 ± 7.2                                                   Control        18.8 ± 9.6    18.8 ± 9.6                                  10     1       21.2 ± 3.9                                                          5       19.5 ± 6.9                                                                            5      51.2 ± 7.5                                                                          8                                             25      21.8 ± 11.3                                                                           25     47.7 ± 8.4                                                                          18                                            125     17.4 ± 1.7                                                                            125    18.0 ± 4.8                                                                          102                                    Estrone                                                                               0.4     54.2 ± 12.1                                                                           0.4    54.2 ± 12.1                                        Dose              Dose                                                         ug/               ug/            Inhib.                                        animal  Action    animal Action  (%)                                    ______________________________________                                         Control        25.4 ±  14.5  25.4 ± 14.5                                 11     5       24.8 ± 11.7                                                                           5      51.3 ± 4.9                                                                          11                                            25      14.7 ± 4.3                                                                            25     52.1 ± 8.9                                                                          8                                             125     19.8 ± 3.3                                                                            125    40.0 ± 4.7                                                                          50                                            625     36.4 ± 17.6                                                                           625    43.7 ± 7.4                                                                          37                                     Estrone                                                                               0.4     54.6 ± 6.5                                                                            0.4    54.6 ± 6.5                                  Control        18.2 ± 5.5    18.2 ± 5.5                                         5       17.8 ± 4.6                                                                            5      53.2 ± 9.0                                                                          25                                            25      23.6 ± 2.5                                                                            25     44.6 ± 7.1                                                                          43                                            125     34.0 ± 7.2                                                                            125    40.8 ± 8.7                                                                          51                                                              625    41.8 ± 7.4                                                                          49                                     Estrone                                                                               0.4     64.7 ± 8.7                                                                            0.4    64.7 ± 8.7                                  ______________________________________                                    

Table 3 shows the results of research on the cytostatic activity of compounds 1 and 6 in comparison with tamoxifen.

On the hormone-sensitive human MCF-7 breast cells, a strong inhibition of the cell growth, determined by cell count and [³ H] thymidine incorporation, was found in the DNA. With concentrations of 10⁻⁷ M, a significant lowering of the cell count and of the thymidine incorporation was found six days after incubation. Under the same conditions, tamoxifen exhibited no significant effect.

The test protocol for the research is fully described in Eur.J. Cancer Clin. Oncol. 1985, 21, 531.

                  TABLE 3                                                          ______________________________________                                         Action of 1 and 6 on the growth of hormone-dependent                           human MCF-7 breast cancer cells                                                                               [.sup.3 H] Thymidine                                      Concn.     Cell Count                                                                               incorporation                                   Cmpd.     (M)        (% T/C)   (% T/C)                                         ______________________________________                                         1         1 × 10.sup.-7                                                                       106       67                                                        5 × 10.sup.-7                                                                       84        76                                                        1 × 10.sup.-6                                                                       94        85                                                        5 × 10.sup.-6                                                                       62        74                                              6         1 × 10.sup.-7                                                                       65        32                                                        5 × 10.sup.-7                                                                       49        32                                                        1 × 10.sup.-6                                                                       24        22                                                        5 × 10.sup.-6                                                                       12         3                                              8         1 × 10.sup.-7                                                                       48                                                                  1 × 10.sup.-6                                                                       44                                                                  1 × 10.sup.-5                                                                       38                                                        10        1 × 10.sup.-7                                                                       75                                                                  1 × 10.sup.-6                                                                       52                                                                  1 × 10.sup.-5                                                                       36                                                        12        1 × 10.sup.-7                                                                       47                                                                  1 × 10.sup.-6                                                                       46                                                                  1 × 10.sup.-5                                                                       41                                                        Tamoxifen 1 × 10.sup.-7                                                                       77        71                                                        1 × 10.sup.-6                                                                       27        27                                              ______________________________________                                    

Tables 4, 5, and 6 show, analogously to Tables 1, 2, and 3, the corresponding data for the tested 1-carbamoylalkyl-2-phenylindoles of general Formula IIIb.

As can be seen from Table 5, these compounds not only exhibit marked anti-estrogenity, but at high dosages also have a significant estrogen activity.

                  TABLE 4                                                          ______________________________________                                         Tested 1-carbamoylalkyl-2-phenylindoles of                                     General Formula IIIb and Their Formula IIIb                                    and Their Relative Binding Affinities for                                      the Estrogen Receptor                                                           ##STR9##                                                                      Compound    R.sub.4      R.sub.5 RBA                                           ______________________________________                                         16          (CH.sub.2).sub.4  7                                                17          (CH.sub.2).sub.5 19                                                18          (CH.sub.2).sub.2O(CH.sub.2).sub.2                                                               26                                                19          C.sub.2 H.sub.5                                                                             C.sub.2 H.sub.5                                                                        15                                            20          CH.sub.2 C.sub.6 H.sub.5                                                                    H       12                                            ______________________________________                                    

                  TABLE 5                                                          ______________________________________                                         Uterotrophic and antiuterotrophic action of                                    1-carbamoylalkyl-2-phenylindoles of general                                    formula IIIb on infantile mouse                                                Uterotrophic Test Antiuterotrophic Test                                                Dose:             Dose           Inhib.                                        ug/               ug/                                                  Compound                                                                               animal  Action    animal Action  (%)                                   ______________________________________                                         Control         21.9 ± 2.7    21.9 ± 2.7                                 16      5       18.2 ± 2.3                                                                            5      47.5 ± 10.9                                                                         10                                            25      16.5 ± 2.4                                                                            25     42.0 ± 7.0                                                                          29                                            125     17.7 ± 0.9                                                                            125    35.2 ± 5.5                                                                          53                                            625     35.3 ± 10.7                                                                           625    40.7 ± 3.9                                                                          44                                    Estrone 0.4     50.2 ± 3.1                                                                            0.4    50.2 ± 3.1                                 Control         14.4 ± 2.5    14.4 ± 2.5                                 17      1       23.8 ± 2.8                                                          5       17.7 ± 3.2                                                                            5      48.7 ± 9.1                                                                           6                                            25      16.3 ± 3.0                                                                            25     42.9 ± 4.7                                                                          22                                            125     18.6 ± 2.5                                                                            125    29.5 ± 2.7                                                                          59                                    Estrone 0.4     50.8 ± 7.3                                                                            0.4    50.8 ± 7.3                                 Control         18.8 ± 9.6    18.8 ± 9.6                                 18      1       20.2 ± 3.4                                                          5       22.0 ± 5.6                                                                            5      53.5 ± 8.7                                         25      21.2 ± 4.6                                                                            25     52.8 ± 7.4                                         125     43.0 ± 8.2                                                                            125    39.8 ± 18.1                                                                         41                                    Estrone 0.4     54.2 ± 12.1                                                                           0.4    54.2 ± 12.1                                Control                                                                        19      5       18.4 ± 3.2                                                                            5      50.9 ± 8.2                                                                          13                                            25      17.9 ± 2.0                                                                            25     50.9 ± 4.8                                                                          13                                            125     17.6 ± 2.6                                                                            125    44.5 ± 6.2                                                                          34                                            625     32.7 ± 6.5                                                                            625    35.3 ± 6.1                                                                          66                                    Estrone 0.4     54.6 ± 6.5                                                                            0.4    54.6 ± 6.5                                 Control         15.6 ± 5.8    15.6 ± 5.8                                 20      5       16.5 ± 3.6                                                                            5      50.7 ± 5.0                                         25      20.9 ± 6.5                                                                            25     46.9 ± 7.7                                                                          12                                            125     16.7 ± 3.9                                                                            125    50.3 ± 4.6                                         625     19.9 ± 4.1                                                                            625    59.5 ± 12.4                                                                         -23                                   Estrone 0.4     51.2 ± 5.9                                                                            0.4    51.2 ± 5.9                                 ______________________________________                                    

                  TABLE 6                                                          ______________________________________                                         Action of 1-carbamoylalkyl-2-phenylindoles of                                  general formula IIIb on the growth of hormone-dependent                        human MCF-7 breast cancer cells                                                Compound  Concentration (M):                                                                            Cell Count (% T/C)                                    ______________________________________                                         16        1 · 10.sup.-7                                                                        57.2 ± 4.4                                                   5 · 10.sup.-7                                                                        48.2 ± 5.4                                                   1 · 10.sup.-6                                                                        47.1 ± 3.7                                                   5 · 10.sup.-6                                                                        44.0 ± 3.6                                                   1 · 10.sup.-5                                                                        42.1 ± 4.0                                         17        1 · 10.sup.-7                                                                        89.0 ± 10.8                                                  5 · 10.sup.-7                                                                        95.5 ± 10.2                                                  1 · 10.sup.-6                                                                        96.0 ± 7.7                                                   5 · 10.sup.-6                                                                        99.6 ± 7.6                                                   1 · 10.sup.-5                                                                        86.5 ± 8.3                                         18        1 · 10.sup.-7                                                                        57.5 ± 6.8                                                   5 · 10.sup.-7                                                                        58.1 ± 6.7                                                   1 · 10.sup.-6                                                                        56.4 ± 5.2                                                   5 · 10.sup.-6                                                                        42.4 ±  3.7                                                  1 · 10.sup.-5                                                                        33.3 ± 2.8                                         19        1 · 10.sup.-7                                                                        59.7 ± 6.1                                                   5 · 10.sup.-7                                                                        60.1 ± 3.8                                                   1 · 10.sup.-6                                                                        61.4 ± 4.4                                                   5 · 10.sup.-6                                                                        56.2 ± 4.5                                                   1 · 10.sup.-5                                                                        44.9 ± 3.7                                         20        1 · 10.sup.-7                                                                        58.3 ± 4.9                                                   5 · 10.sup.-7                                                                        47.9 ± 3.0                                                   1 · 10.sup.-6                                                                        46.8 ± 4.2                                                   5 · 10.sup.-6                                                                        36.6 ± 2.5                                                   1 · 10.sup.-5                                                                        26.8 ± 4.2                                         ______________________________________                                    

The invention also relates to pharmaceutical preparations which contain at least one compound of general Formulas I or IIIb, as well as their salts, and the use of these compounds for treatment of estrogen-dependent diseases and tumors.

The compounds according to the invention are suitable for production of pharmaceutical compositions and preparations. The pharmaceutical compositions or pharmaceutical agents contain as an active ingredient one or more of the compounds according to the invention, optionally in mixture with other pharmacologically or pharmaceutically active materials. The production of the pharmaceutical agents takes place in a known way, and the known and usual pharmaceutical auxiliary agents, as well as other usual vehicles and diluents, can be used.

Suitable as such vehicles and auxiliary agents are, for example, those that are recommended or indicated in the following literature passages as auxiliary agents for pharmacy, cosmetics, and related fields: Ullmans Encyklopaedie der technischen Chemie [Ullman's Encyclopedia of Industrial Chemistry], Vol. 4 (1953), pp. 1-39; Journal of Pharmaceutical Sciences, Vol. 52 (1963), p. 918 ff.; H.v. Czetsch-Lindewald, Hilfsstoffe fuer Pharmazie und angrenzende Gebiete [Auxiliary Agents for Pharmacy and Related Fields], Pharm. Ind., No. 2, 1961, p. 72 ff.; Dr. H. P. Fiedler, Lexikon der Hilfstoffe fuer Pharmazie, Kosmetik und angrenzende Gebiete [Lexicon of Auxiliary Agents for Pharmacy, Cosmetics and Related Fields], Cantor KG. Aulendorf in Wuerttemberg 1971.

The compounds can be administered orally or parenterally, e.g., intraperitoneally, intramuscularly, subcutaneously, or percutaneously. The compounds can also be implanted in the tissue. The amount of the compound to be administered fluctuates within a wide range. As a function of the condition to be treated and the type of administration, the amount of administered compound can generally be 0.01-100 mg/kg of body weight, preferably 0.1-20 mg/kg of body weight, per day. Guidelines for determining particularly preferred dosage ranges within said ranges can be found in literature for treating specific conditions with specific anti-estrogenic agents of known activity. In a given case, a clinician of ordinary skill in the art can determine the optimum dosage ranges by conventional and routine experimentation.

Capsules, pills, tablets, dragees, etc. are suitable for oral administration. Besides the active ingredient, the dosage units can contain a pharmaceutically compatible vehicle such as, for example, starch sugar, sorbitol, gelatin, lubricant, silicic, acid, talc, etc. The individual dosage units for oral application can contain, for example, 10 to 100 mg of the active ingredient.

For parenteral administration, the active ingredients can be dissolved or suspended in a physiologically compatible diluent. As diluents, very often oils, with or with addition of a solubilizer, surfactant, or suspending or emulsifying agent, can be used. For example, olive, peanut, cottonseed, soybean, castor and sesame oils can be used.

The compounds can also be used in the form of a depot injection or an implantation preparation, which can be formulated so that a delayed active ingredient release is made possible.

Production of Starting Materials

The starting products of general Formula IIa or IIb to be used for the production of the compounds according to the invention of general Formula I are obtained either by:

(a) N-alkylation of the corresponding 1H-2-phenylindole compound X with the corresponding α,Ω-dibromoalkane Br--(CH₂)--Br and subsequent exchange of the omega-BR atom with the NR₄ R₅ group, or

(b) reaction of the corresponding 1H-2-phenylindole compound X--after deprotonation--with the corresponding omega-bromoalkylcarbonamide ##STR10## the latter compounds are easily available by reaction of the corresponding omega-bromocarboxylic acid chloride ##STR11## with an excess of amine HNR₄ R₅.

A1. General Directions for N-alkylation

1.44 g (0.06 mol) of sodium is dissolved at -70° in 200 ml of liquid ammonia. After disappearance of the blue coloring, a solution consisting of 0.035 mol of the corresponding 1H-2-phenylindole compound X (J.Med.Chem. 1984, 24, 1439) in 100 ml of tetrahydrofuran is added to this solution. After 30 minutes stirring time, a solution of 0.042 mol of alpha,omega-dibromoalkane Br--(CH₂)_(n) --Br dissolved in 20 ml of tetrahydrofuran is slowly distilled in the reaction mixture. It is stirred for 30 minutes more, and the cooling bath is removed. After evaporation of the ammonia, the remaining residue is mixed with water and extracted with ether. After separation of the phases, the organic solution is dried and concentrated by evaporation in a vacuum, and the remaining residue is recrystallized from ethanol or purified by column chromatography.

The N-alkyl compounds Ya to Ye thus produced are summarized in Table 7.

                                      TABLE 7                                      __________________________________________________________________________     N-Alkyl Compounds Ya to Ye by Alkylation of                                    Corresponding 1H-2-phenylindole Compounds X                                                  1H-2-Phenyl-                                                                   indole X   Br(--CH.sub.2).sub.n Br                                                                Melt.                                         N-Alkyl Compound Y                                                                           R.sub.3                                                                           R.sub.6                                                                            R.sub.7                                                                            n       point                                         __________________________________________________________________________     Ya 5-methoxy-2-(4-methoxy-                                                                   CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          4       59-60                                         phenyl)-3-methyl-1-                                                            (4-bromobutyl)-indole                                                          Yb 5-methoxy-2-(4-methoxy-                                                                   CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          6       60                                            phenyl)-3-methyl-1-(6-                                                         bromohexyl)-indole                                                             Yc 5-methoxy-2-(4-methoxy-                                                                   H  OCH.sub.3                                                                          OCH.sub.3                                                                          6       82*                                           phenyl)-1-(6-bromohexyl)-                                                      indole                                                                         Yd 5-methoxy-2-(4-methoxy-                                                                   CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          8       oil                                           phenyl)-3-methyl-1-(8-bromo-                                                   octyl)-indole                                                                  Ye 2-(4-methoxyphenyl)-3-                                                                    CH.sub.3                                                                          H   OCH.sub.3                                                                          6       oil                                           methyl-1-(6-bromohexyl)-                                                       indole                                                                         __________________________________________________________________________      *uncertain                                                               

A2. General Directions for Preparation of the Compounds of General Formula IIa by Exchange of the Omega-Bromine Atom in the Alkyl Side Chain

(a) Reaction with a Cyclic Amine

A solution of 3.0 mmol of the corresponding omega-bromoalkylindole Y is heated in 100-150 ml of the cyclic amine for 4 hours to 120° C. After cooling to room temperature, it is shaken out with dichloromethane and water, the combined organic phases are on magnesium sulfate, and the solvent is distilled off. The raw products accumulating as brown oil are chromatographed on silica gel with methanol or methanol/triethylamine (1:1 to 1:3).

(b) Reaction with Phthalimide-Potassium/Hydrazine

8.0 mmol of 1-(omega-bromoalkyl)-indole compound Y and 8.8 mmol of phthalimide/potassium are refluxed in 100 ml of anhydrous dimethylformamide for 2 hours. After cooling, it is shaken out with dichloromethane and water. Then it is dried on sodium sulfate, and the solvent is distilled off. The residue is chromatographed on silica gel with dichloromethane/ethyl acetate (10:1). For release of the amine, it is taken up in 50 ml of ethanol (99 percent) and mixed with hydrazine hydrate in 20 ml of ethanol. It is refluxed for 2 hours; after cooling, is acidified (pH 2-3) with 40 ml of 2 n hydrochloric acid; and the precipitate is suctioned off. After distilling off of the solvent, it is adjusted to be alkaline (pH 8-9) with 40 ml of 2 n sodium hydroxide solution and extracted three times with 50 ml of ethyl acetate each. Then it is dried on sodium sulfate and chromatographed on silica gel with dichloroethane/trimethylamine (5:1).

(c) Reaction with an Aliphatic Amine

7.0 mmol of 1-(omega-bromoalkyl)-indole compound Y is dissolved in 30 ml of ethanol (99 percent), mixed with 40 ml of 40 percent aqueous solution of the aliphatic amine, and refluxed for 3 hours. After cooling, the ethanol is mostly removed, and the residue is taken up in 100 ml of dichloromethane and extracted with 100 ml of water. Then the organic phase is dried on magnesium sulfate, and the solvent is distilled off. The residue is chromatographed on silica gel with methanol.

Compounds IIa, produced according to directions A2.(a), A2.(b), and A2.(c) are set forth in Table 8.

                                      TABLE 8                                      __________________________________________________________________________     Compounds of general formula IIa from                                          N-(omega-bromoalkyl)indoles Y                                                  bromo-               N-(ω                                                                             Amine        Appear- Yield                        Compound of general formula IIa                                                                     alkyl) indole Y                                                                        HNR.sub.4 R.sub.5                                                                      Direction                                                                           ance    (%)                          __________________________________________________________________________     IIa1                                                                              5-Methoxy-2-(4-methoxyphenyl)-3-                                                                 Ya      Pyrrolidine                                                                            A2a  colorless                                                                              51                              methyl-1-[4-pyrrolidino-butyl]-indole  crystals                                                                       mp 59-60° C.                  IIa2                                                                              5-Methoxy-2-(4-methoxyphenyl)-3-                                                                 Yb      Hydrazine                                                                              A2b  pale yellow oil                                                                        ?                               methyl-1-[6-aminohexyl]-indole                                              IIa3                                                                              5-Methoxy-2-(4-methoxyphenyl)-3-                                                                 Yb      Methylamine                                                                            A2c  pale yellow oil                                                                        84                              methyl-1-[6-methylaminohexyl]-                                                 indole                                                                      IIa4                                                                              5-Methoxy-2-(4-methoxyphenyl)-3-                                                                 Yb      Dimethylamine                                                                          A2c  pale yellow oil                                                                        41                              methyl-1-[6-dimethylaminohexyl]-                                               indole                                                                      IIa5                                                                              5-Methoxy-2-(4-methoxyphenyl)-                                                                   Yc      Pyrrolidine                                                                            A2a  pale yellow oil                                                                        77                              1-[6-pyrrolidino-hexyl]-                                                       indole                                                                      IIa6                                                                              5-Methoxy-2-(4-methoxyphenyl)-3-                                                                 Yb      Pyrrolidine                                                                            A2a  yellow oil                                                                             90                              methyl-1-[6-pyrrolidinohexyl]-                                                 indole                                                                      IIa7                                                                              5-Methoxy-2-(4-methoxyphenyl)-                                                                   Yc      Piperidine                                                                             A2a  pale yellow oil                                                                        90                              1-[6-piperidino-hexyl]-                                                        indole                                                                      IIa8                                                                              5-Methoxy-2-(4-methoxyphenyl)-3-                                                                 Yb      Piperidine                                                                             A2a  pale yellow oil                                                                        89                              methyl-1-[6-piperidino-hexyl]-indole                                        IIa9                                                                              5-Methoxy-2-(4-methoxyphenyl)-3-                                                                 Yd      Pyrrolidine                                                                            A2a  yellow oil                                                                             65                              methyl-1-[8-pyrrolidino-octyl]-                                                indole                                                                      IIa13                                                                             2-(4-Methoxyphenyl)-3-methyl-1-                                                                  Ye      Pyrrolidine                                                                            A2a  pale yellow oil                                                                        75                              [6-pyrrolidino-hexyl]-indole                                                __________________________________________________________________________

B. General Directions for Production of the Compounds of General Formula IIb by Reaction of 1H-2 Phenylindoles X With Omega-Bromoalkylcarbonamides ##STR12##

In a reaction flask, 20.0 mmol of NaH in paraffin under nitrogen is freed of the paraffin by multiple washing with ether and mixed with 20 ml of dry dimethylacetamide. A solution of 14 mmol of 1H-2-phenylindole X in 80 ml of dry dimethylacetamide is instilled into this mixture under cooling with ice. After 30 minutes of stirring under ice cooling, a solution of 15 mmol of omega-bromoalkylcarbonamide in 60 ml of dry dimethylacetamide is instilled. After 2 hours of stirring at room temperature, the NaH excess is carefully destroyed with water. The reaction mixture is extracted several times with ethyl acetate. The combined organic phases are washed with water, dried on Na₂ SO₄, and freed of solvent. The products are purified by column chromatography.

Compounds IIb, produced according to the above directions, are set forth in Table 9.

                                      TABLE 9                                      __________________________________________________________________________     Compounds of general formula IIb from 1-H-phenylindoles X                                          1H-2-Phenylindol X                                                             Bromoalkyl-ω  Appearance/                            Compounds of general formula IIb                                                                   R.sub.3                                                                           R.sub.6                                                                            R.sub.7                                                                            carbonamide                                                                             melting point                          __________________________________________________________________________     IIb 16                                                                             5-Methoxy-2-(4-methoxyphenyl)-                                                                 CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          6-bromohexanoyl-                                                                        yellow resin                               3-methyl-1-(6-pyrrolidino- pyrrolidine                                         carbonylpentyl)-indole                                                     IIb 17                                                                             5-Methoxy-2-(4-methoxyphenyl)-                                                                 CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          6-bromohexanoyl-                                                                        bright yellow                              3-methyl-1-(6-piperidino-  piperidine                                          carbonylpentyl)-indole                                                     IIb 18                                                                             5-Methoxy-2-(4-methoxypentyl)-                                                                 CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          6-bromohexanoyl-                                                                        bright brown                               3-methyl-1-(6-morpholinocarbo-                                                                            morpholine                                                                              resin                                      nylpentyl)-indole                                                          IIb 19                                                                             1-(6-Diethylcarbamoylpentyl)-                                                                  CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          6-bromohexamoyl-                                                                        colorless resin                            5-methoxy-2-(4-methoxyphenyl)-                                                                            diethylamine                                        3-methylindole                                                             IIb 20                                                                             1-(6-Benzylcarbamoylpentyl)-                                                                   CH.sub.3                                                                          OCH.sub.3                                                                          OCH.sub.3                                                                          M-(6-bromo-                                                                             melting point                              5-methoxy-2-(4-methoxyphenyl)-                                                                            hexanoyl)-                                                                              (ethanol)                                  3-methylindole             benzyl-amine                                                                            127-129                                __________________________________________________________________________

Without further elaboration, it is believed that one skilled in the art can, using the preceding description, utilize the present invention to its fullest extent. The following preferred specific embodiments are, therefore, to be construed as merely illustrative and not limitative of the remainder of the disclosure in any way whatsoever.

In the foregoing and in the following examples, all temperatures are set forth uncorrected in degrees Celsius; and, unless otherwise indicated, all parts and percentages are by weight.

The entire texts of all applications, patents, and publications, cited above and below, and of corresponding West German Application No. P 38 21 148.3, filed June 23, 1988, are hereby incorporated by reference.

EXAMPLES EXAMPLES 1-20 C1. General Directions for Production of the Compounds of General Formula Ia (i.e., compounds of General Formula I, which exhibit at least one free hydroxy group) and IIb by Ether Cleavage of IIa or IIb

Under a nitrogen atmosphere and with ice cooling, there is dissolved 4.0 mmol of indole derivative IIa or IIb in 100 ml of anhydrous dichloromethane. It is stirred for about 10 minutes more, and 9.0 mmol (2.25 g, 0.85 ml) of boron tribromide, dissolved in 3 ml of absolute dichloromethane, is instilled. It is now stirred for 30 minutes with ice cooling and 2-3 hours at room temperature. With renewed ice cooling, 20 ml of ethyl acetate is instilled and stirred for 30 minutes at room temperature. It is shaken out at least three times with 50 ml each of ethyl acetate, 10 percent sodium bicarbonate solution, and water. The combined organic phases are dried on magnesium sulfate, and the resultant dried phases are dissolved in ethanol and then crystallized in a freezer. The colorless to yellow-brown products obtained of general Formula Ia or IIIb are suctioned off, washed several times with water, and dried in a desiccator on phosphorus pentoxide.

The compounds of general Formula Ia, thus produced, are shown in Table 10, and those of general Formula IIIb are shown in Table 11.

C2. General Directions for Esterification of Compounds of General Formula Ia

12.3 mmol of the compound of general Formula Ia is dissolved in 50 ml of methylene chloride, mixed with 20 ml of the corresponding acid anhydride or acid halide and 10 ml of pyridine and stirred overnight. Then it is put into 200 ml of water, extracted with methylene chloride, dried, and concentrated by evaporation in a vacuum.

C3. General Directions for Production of the Hydrochloride of a Compound of General Formula I

First, a compound of general Formula Ia, as described in C2, is esterified. The oily residue remaining after concentration by evaporation of the methylene chloride extract is dissolved in 200 ml of ether; hydrochloric acid gas is conducted through this solution for 30 minutes. The resulting precipitate is suctioned off and dried.

                                      TABLE 10                                     __________________________________________________________________________     Example/                Starting              Mp   Yield                       Compound                                                                             Compound of general formula I                                                                    Product Directions                                                                           Appearance                                                                             [°C.]                                                                        [%]                         __________________________________________________________________________     1     5-Hydroxy-2-(4-hydroxyphenyl)-3-                                                                 IIa 1   C1    Beige Crystals                                                                         148  35                                methyl-1-[4-pyrrolidino-butyl]-indole   (decom)                          2     5-Hydroxy-2-(4-hydroxyphenyl)-3-                                                                 IIa 2   C1    Yellow crystals                                                                        >139 76                                methyl-1-[6-amino-hexyl]-indole         (decom)                          3     5-Hydroxy-2-(4-hydroxyphenyl)-3-                                                                 IIa 3   C1    Yellow crystals                                                                        194  24                                methyl-1-[6-methylamino-hexyl]-indole   (decom)                          4     5-Hydroxy-2-(4-hydroxyphenyl)-3-                                                                 IIa 4   C1    Yellow crystals                                                                        189  73                                methyl-1-[6-dimethylamino-hexyl]-       (decom)                                indole                                                                   5     5-Hydroxy-2-(4-hydroxyphenyl)-                                                                   IIa 5   C1    Yellow crystals                                                                        109-112                                                                             50                                1-[6-pyrrolidino-hexyl]-indole          (decom)                          6     5-Hydroxy-2-(4-hydroxyphenyl)-3-                                                                 IIa 6/IIb 16                                                                           C1    Beige crystals                                                                         148-150                                                                             56                                methyl-1-[6-pyrrolidino-hexyl]-indole   (decom)                          7     5-Hydroxy-2-(4-hydroxyphenyl)-                                                                   IIa 7   C1    Reddish brown                                                                          125-128                                                                             80                                1-[6-piperidino-hexyl]-indole   crystals                                                                               (decom)                          8     5-Hydroxy-2-(4-hydroxyphenyl)-                                                                   IIa 8/IIb 17                                                                           C1    Yellow  102  23                                3-methyl-1-[6-piperidino-hexyl]-indole                                                                         crystals                                                                               (decomp)                         9     5-Hydroxy-2-(4-hydroxyphenyl)-3-                                                                 IIa 9   C1    Yellow  166-169                                                                             42                                methyl-1-[8-pyrrolidino-ocytl]-indole                                                                          crystals                                                                               (decomp)                         10    5-Hydroxy-2-(4-hydroxyphenyl)-3-                                                                 IIb 18        ?       107-110                                                                             ?                                 methyl-1-[6-morpholino-hexyl]-indole    (decomp)                         11    1-(6-Diethylaminohexyl)-5-hydroxy-                                                               IIb 19  C1    bright yellow                                                                          ?    ?                                 2-hydroxyphenyl)-3-methyl-indole                                                                               amorphous                                                                      powder                                   12    1-(6-Benzylaminohexyl)-5-hydroxy-                                                                IIb 20  C1    beige   ?    ?                                 2-(4-hydroxyphenyl)-3-methyl-indole                                                                            amorphous                                                                      powder                                   13    2-(4-Hydroxyphenyl)-3-methyl-1-[6-                                                               IIa 13  C1    Yellow crystals                                                                        ?    35                                pyrrolidino-hexyl]-indole                                                14    5-Acetoxy-2-(4-acetoxyphenyl)-3-                                                                 Compound 7 +                                                                           C2    yellow  --   53                                methyl-1-[6-piperidino-hexyl]-indole                                                             Acetic        oil                                                              anhydride                                              15    5-Benzoyloxy-2-(4-benzoyloxyphenyl)-                                                             Compound 7 +                                                                           C3    Pale yellow                                                                            --   55                                3-methyl-1-[6-piperidino-hexyl]-indole                                                           Benzoyl       oil                                            Hydrochlorid      chloride                                               __________________________________________________________________________

                                      TABLE 11                                     __________________________________________________________________________     Example/                  Starting                                             compound                                                                             Compound of general formula IIIb                                                                   product                                                                            Apperance                                                                             Mp (°C.)                           __________________________________________________________________________     16    5-Hydroxy-2-(4-hydrdoxyphenyl)-3-methyl-                                                           IIb 16                                                                             bright green                                                                          ?                                               1-(6-pyrrolidinocarbonylpentyl)-indole                                                                 amorphous                                                                      powder                                           17    5-Hydroxy-2-(4-hydroxyphenyl)-3-methyl-                                                            IIb 17                                                                             orange 83-94                                           1-(6-pyrrolidinocarbonylpentyl)-indole                                                                 amorphous                                                                      powder                                           18    5-Hydroxy-2-(4-hydroxyphenyl)-3-methyl-                                                            IIb 18                                                                             bright yellow                                                                         ?                                               1-(6-morpholinocarbonylpentyl)-indole                                                                  amorphous                                                                      powder                                           19    1-(6-Diethylcarbamoylpentyl)-5-hydroxy-2-                                                          IIb 19                                                                             yellowish                                                                             ?                                               (4-hydroxyphenyl)-3-methylindole                                                                       amorphous                                                                      powder                                           20    1-(6-Benzylcarbamoylpentyl)-5-hydroxy-2-                                                           IIb 20                                                                             ?      189-191                                         (4-hydroxyphenyl)-3-methylindole                                         __________________________________________________________________________

EXAMPLES 21-23

The following Examples 21-23 are pharmaceutical formulations of some compounds according to the invention.

EXAMPLE 21

21 g of 5-hydroxy-2-(4-hydrophenyl)-1-(6-pyrrolidinohexyl]-indole and 89.0 g of lactose are homogeneously mixed and, in each 210 mg of this mixture is poured into resin gelatin, two-piece capsules of size 3.

EXAMPLE 22

Tablets can be produced in the usual way from the following components:

    ______________________________________                                         50        mg of 5-hydroxy-2-(4-hydrophenyl)-3-                                           methyl-1-(6-pyrrolidino-hexyl]-indole                                200       mg of lactose                                                        200       mg of microcrystalline cellulose                                     50        mg of magnesium stearate                                             500       mg total weight of tablets                                           ______________________________________                                    

EXAMPLE 23

Tablets can be produced in the usual way from the following components:

    ______________________________________                                         10        mg of 5-hydroxy-2-(4-hydrophenyl)-3-                                           methyl-1-(8-pyrrolidino-octyl]-indole                                220       mg of lactose                                                        220       mg of microcrystalline cellulose                                     50        mg of magnesium stearate                                             500       mg of total weight of tablets                                        ______________________________________                                    

The preceding examples can be repeated with similar success by substituting the generically or specifically described reactants and/or operating conditions of this invention for those used in the preceding examples.

From the foregoing description, one skilled in the art can easily ascertain the essential characteristics of this invention and, without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various usages and conditions. 

What is claimed is:
 1. 1-Carbamoylalkyl-2-phenylindoles of formula IIIb ##STR13##
 2. A compound according to claim 1:5-hydroxy-2-(4-hydroxyphenyl)-3-methyl-1-(6-pyrrolidinocarbonylpentyl)-indole, 5-hydroxy-2-(4-hydroxyphenyl)-3-methyl-1-(6-piperidinocarbonylpentyl)-indole, 5-hydroxy-2-(4-hydroxyphenyl)-3-methyl-1-(6-morpholinocarbonylpentyl)-indole, 1-(6-diethylcarbamoylpentyl)-5-hydroxy-2-(4-hydroxyphenyl)-3-methylindole, or 1-(6-benzylcarbamoylpentyl)-5-hydroxy-2-(4-hydroxyphenyl)-3-methylindole.
 3. A pharmaceutical preparation comprising a pharmaceutical carrier and a compound according to claim
 4. 4. A pharmaceutical preparation comprising a pharmaceutical carrier and a compound according to claim
 2. 5. A method of treating an estrogen-dependent disease comprising adminstering an anti-estrogenically effective dosage of a compound according to claim
 1. 6. A method of treating an estrogen-dependent disease comprising adminstering an anti-estrogenically effective dosage of a compound according to claim
 2. 